Needle-loop take-up for sewing-machines.



A. H. WEIS.

NEEDLE LOOP TAKE-UP FOR SEWING MACHINES.

APPLICATION FILED APR.9,1912.

1,061,645. Patented May 13, 1913.

WITNESSES: INVENTOR /lb %w,

COLUMBIA FLANOURAPH cu.,wA$nmnTnN. II, c.

UNITE STA'IL A TENT OFFICE.

ALBERT H. WEIS, OF SPARKILL, NEW YORK, ASSIGNOR TO LUCIUS N. LITTAUER,OF

GLOVERSVILLE, NEW YORK.

NEEDLE-LOOP TAKE-UP FOR SEWING-MACHINES.

Specification of Letters Patent.

Application filed April 9, 1912.

To all whom it may concern:

Be it known that I, ALBERT I-I. Wnis, a citizen of the United States,residing at Sparkill, in the county of Rockland and State of New York,have invented certain new and useful Improvements in Needle- LoopTake-Ups for Sewing-Machines, of which the following is a specification.

This invention relates to sewing machines, and more particularly to thatclass thereof known as twin needle machines, the improvementparticularly relating to improved needle loop take-ups, the object ofthe invention being to provide a simple and of fective improved needleloop take-up for sewing machines having a plurality of needles and inthe use of which the size of the needle loops will be effectivelycontrolled, the overlapping and tangling of the needle loops preventedand a more uniform formation of the needle loops obtained.

I-Ieretofore it has been impossible to control the size of the needleloops in those machines having a plurality of needles and frequentlydesignated as twin needle machines, in which each needle carries athread and cooperates with a thread carrying looper to form anornamental or covering stitch on the bottom of the work. In narrow-gagemachines, in which the needles are spaced comparatively close together,the needle loops very frequently overlap or become tangled with oneanother, which causes an imperfect formation of the stitch and alsoresults in the skipping of stitches and the breaking of threads. Inthose machines known as wide-gage machines, while the loops do nottangle with one another, yet the fart-her apart the needles are the moredifficult it is to control the size of the needle loops, because thesingle looper cooperating with the two needles necessitates that theneedles be set one lower than the other a distance corresponding withthe width or gage of the needles; that is to say, in a quan tor-inchgage machine the outside or lefthand needle must be a quarter of an inchlower than the right-hand needle. From this it will be seen that theloop of the thread deflected by the longer needle is much greater thanthat deflected by the shorter needle, and consequently has a tendency toturn away from the looper as it about to enter the same. Consequently,in machines where two or more needles are used there has beenconsiderable dilliculty in controlling the needle loops. By means of thepresent improvement, however, which has proved very e'll'ectivc andellicient in service, the needle loops are controlled, the tanglingthereof prevented and a more uniform formation of the loops obtained forthe passage of the loopcr tlurcthrmigh.

In the accompanying drawings, Figure 1 is a front view illustrating aportion of a sewing machine overhanging arm and needle actuating arn'ior lever with this improvement attached thereto; Fig. 2 is a detail topview of a part of the improvement shown in Fig. 1; Fig. 3 is a similarview to that shown in Fig. 1, but illustrating the take-up device in adifferent position; Fig. -l is a similar view to that shown in Figs. 1and 3, but illustrating the needle actuating lever in its lowestposition; Fig.6 is a perspective detail view of the takc-up lever; Figs.(3 and 7 are views of a pair of needles and looper, illustrating theformation of the loops and the position of such loops as the looper isabout to enter the same; Fig. 8 illustrates two views of the take-upactuating device; and Fig. 9 is a detail view, partly in cross section,of the parts of this improvement.

Similar characters of reference indicate corresponding parts throughoutthe figures of the drawings.

Only so much of a sewing machine as is necessary to illustrate thepresent improvement is shown herein, and this comprises the usualoverhanging arm or gooseneck 2, on which the needle actuating arm 3 ispivotally supported for movement relatively thereto.

In the present embcnlimcnt the needle loop take-up device is in the formof a lever 4 of resilient or spring formation and is provided with abent or flanged end n'ovided with thread eyes (i for the passage of thethreads. This lever is pivotally secured to a thread guidc7 likewisehaving eyes 8 for the passage of the threads. This thread guide issecured to the overhanging arm and is adjustable relatively thereto, forwhich purpose it is provided with a slot 9. The thrrads pass through theeyes 8 of this thread guide 7 as they come from the tension devices,from thence they pass through the eyes 6 of the take-up lever 4, thenpass to eyes 9 carried by the needle actuating arm or lever 3, fromthence to eyes 10 carried by the presser foot bar 11, and from thence tothe needles 12. The thread guide is provided with a projection 13adapted to fit into a recess 14 located in the under edge of the take-uplever 4, whereby downward movement of the lever i is limited.

Adjustably ing lever or bar 3 is a take-up operating device, shown inthe present instance as a hookformed member or wire 15, the hook 16 ofwhich is located at an angle to the shank 16 of the wire and in aninclined position relative to the perpendicular.

In operation, as needle actuating lever or arm 3 moves downward the wireforces the spring take-up lever in toward the overhanging arm of themachine, thus enabling the hook to pass so that the spring take-up leverwill spring over the inclined portion of the wire as shown in Fig. 4:.At this time the needle actuating lever 3 is at its lowest position. Asthe needle actuating lever starts to ascend the inclined end of the hookcomes into contact with the flanged or bent end of the take-up lever, asshown in Fig. 3, causing the take-up lever to ride up such inclinedport-ion of the wire, so that the needle threads will be lifted or havea movement greater than that of the needles themselves and therefore ofthe needle actuating lever.

The take-up operating device or wire is adjusted so that when the needleloops are drawn up sufficiently to cont-r01 them at the time the looperenters the same the takeup lever will automatically cast itself off of'the hook member, this being obtained by providing in the hook member anotch or cut away portion 17 at the side of the in- 40 clined portion ofthe wire, thus automatically releasing and giving slack to the needle 1threads while the looper is passing through;

needle loop take-up means for controlling the loops.

From the foregoing it will be observed 5 that by reason of the inclinedend of the hooked wire the upward movement of the wire does not give thesame movement to the spring takeup lever that it would if the hooked endwere straight or at right angles to to the shank thereof, but that thetake-up lever gradually gains in movement or speed the upward movementof;

as compared with the hook by reason of the inclined end of such hook,resulting in the proper drawing After the take-up lever has up of theloop. been cast off the tension of the to pull it thread tends if thehook be adjusted by swinging it to its. dotted line position the take-uplever would secured to the needle actuat rality of needles,

down, and this, together with itsown weight, causes it to assume theposition the needle actuating arm for shifting said dotted position ofthe hook have only a short upward movement. Thus it will be observedthat by adjusting the hook by swinging it relatively to the needleactuating lever the action of the takeup lever will be quickened orshortened. In other words, if the angle of the hook portion is greaterthan that shown the take-up lever will lift faster.

Fig. 6 illustrates the manner in which the needle loops are deflectedwhen this improved loop take-up device is not used and it will beobserved that one loop is much larger than the other.

Fig. 7 illustrates the two loops when this improved loop take-up is usedand from which it will be observed that both loops are maintained of thesame size and lay closer to the two needles.

I claim as my invention:

1. In a sewing machine having an overhanging arm, a plurality of needlesand a needle actuating lever, needle loop take up means for giving tothe needle threads a movement greater than that of said needle leverduring the upward movement of such needles and prior to the needlesleaving the 1 work thereby to insure a uniform formation of all of theneedle loops.

2. In a sewing machine having an overhanging arm, a movable arm, and apluneedle loop take up means for controlling the needle loops andcomprising a movable part movable arm for shifting said movable partduring the upward movement of the needles and prior to the needlesleaving the work thereby to obtain uniformity in the sizes of all of theloops.

3. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm,

carried by the overhanging arm and a part carried by the the needleloops and comprising a movable pivotally supported needle actuating arm,

needle loop take-up means for controlling the needle loops andcomprising a shiftable resilient member carried by the overhanging armand a normally fixed part carriedby resilient member prior to the needleleaving the work thereby to obtain uniformity in the sizes of the loops.

5. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm,

needle loop take-up means for controlling the needle loops andcomprising a resilient member carried by the overhanging arm and anormally fixed part carried by the needle actuating arm, said fixed parthaving an inclined portion and a notch for casting off the resilientmember.

6. In a sewing machine of the class described having an overhanging armand an oscillating arm, needle loop take up means for controlling theneedle loops and comprising a lever pivotally secured to saidoverhanging arm, and means carried by said oscillating arm and effectiveon its upward movement to raise said lever thereby to take up the needleloop during the upward movement of the needle and prior to the needleleaving the work thereby to obtain uniformity in the sizes of the loops.

In a sewing machine of the class de scribed having an overhanging arm, aplurality of needles and a pivotally supported needle actuating arm, asingle needle loop take up means for controlling the needle loops of allthe needles and comprising a lever pivotally secured to said overhangingarm, and means carried by the needle actuating arm for raising saidlever during the upward movement of the needles and prior to the needlesleaving the work thereby to obtain uniformity in the sizes of all of theloops.

8. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops to maintain uniformity thereofduring the formation of such loops and comprising a lever pivotallysecured to said overhanging arm and means for raising said lever at apredetermined time and carried by the needle actuating arm, said leverraising means having an inclined lever-engaging portion riding undersaid lever during the raising thereof to effect the completedisengagement of such parts at a predetermined time by the gradualslipping of the lever down the inclined portion of said lever raisingmeans.

9. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops and comprising a lever pivotallysecured to said overhanging arm and means for raising said lever at apre determined time and carried by the needle actuating arm, said meanshaving an inclined lever-engaging portion and a notch at the sidethereof.

10. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops and comprising a lever pivotallyand adjustably secured to said overhanging arm and means for raisingsaid lever prior to the needle leaving the work thereby to maintainuniformity in the sizes of the loops.

11. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops and comprising a lever pivotallyand adjustably secured to said overhanging arm and means adjustablysecured to the needle actuating arm for raising said lever prior to theneedle leaving the work thereby to maintain uniformity in the sizes ofthe loops.

12. In a sewing machine of theclass described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops and comprising a resilient leverpivotally secured to said overhanging arm and means adjustably securedto the needle actuating arm for raising said lever prior to the needlelea vingthe work thereby to maintain uniformity in the sizes of theloops.

13. In a sewing machine of the class described having an overhanging armand a pivotally supported needle actuating arm, needle loop take-upmeans for controlling the needle loops and comprising a resilient leverpivotally secured to said overhanging arm and means adjustably securedto the needle actuating arm for raising the said lever and comprising ahook-formed memher having the hook thereof located in an inclinedposition relative to the shank of such member.

147. In a sewing machine of the class clescribed having an overhangingarm and a needle actuating arm pivotally supported thereon, needle looptake-up means for controlling the needle loops and comprising aresilient lever pivotally secured to said overhanging arm and having abent end provided with openings for the passage of the needle-threads,and a hook-shaped member secured to the needle actuating arm and havingan inclined upper end for raising and lowering said means.

15. In a sewing machine of the class described having an overhanging armand a needle actuating arm pivotally supported thereon, needle looptake-up means for controlling the needle loops and comprisin a resilientlever pivotally secured to said overhanging arm and having a bent endprovided with openings for the passage of the needle threads and ahook-formed member secured to the needle actuating arm and having aninclined upper end for raising and lowering said means, and athread-guide secured on said overhanging arm and adjustably supportingsaid lever.

Copies of this patent may be obtained for &

' 16. In a sewing machine of the class described having an overhangingarm and a (needle actuating arm pivotally supported thereon, needle looptake-up means for controlling the needle loops and comprising aresilient lever pivotally secured to said overhanging arm and having abent end provided with openings for the passage of the needle threadsand a hook-formed member secured to the needle actuating arm and havingan inclined upper end for raising and lowering said means, and a threadguide secured on said overhanging arm and adjustably supporting saidlever, said guide and lever having means for limiting the downwardmovement of said lever.

17. In a sewing machine, the combination with a pair of supportingmembers, one a. fixed member and the other movable relatively thereto,of loop take up means comprising a pair of members one carried by eachof said supporting members, one movable with said movable member and theother movable relatively to said fixed member and cooperating to insurea uniform formation of the needle loops during the upward movement ofthe needle and prior to the needle leaving the work.

18.- In a sewing machine having an overhanging armand an oscillatingneedle actuatlng lever, needle loop take up means for controlling theneedle loops and comprising cooperating means carried by the overhangingarm and the needle actuating lever and effective for giving to thethread a greater speed or movement than the needle aetuat- 'ing leveritself has during the upward moveinent of the needle and prior to theneedle leaving the work whereby uniformity in the sizes of the loops isobtained.

19. In a sewing machine, the combination with a pair of supportingmembers, one a fixed member and the other a movable member movablerelatively thereto, of loop take up means comprising a'pai-r of membersone carried by each of said supporting members,

one movablewith said movable member and.

the other sniftable on said fixed member and shiftable upwardly by themember carried by said movable supporting member to insure a uniformformation of the needle loops during the upward movement of the needle 7and prior to the needle leaving the Work.

20. In a sewing machine having an overhanging arm and an oscillatingneedle-actuating lever, needle loop take up means for controlling theneedle loops and comprising cooperatingmeans carried by the overhangingarm and the needle actuating lever and comprising a thread carryingmember shiftably supported for rising and falling movement on theoverhanging arm and means carried by the oscillating needle lever and.

' JOHN P. VEIS,

EDWARD L. RUssELL.

Washington, D. G.

five cents each, by addressing the Commissioner of Patents,

